Signal Glitch Was Cited at Bridge in Derailment

By

Hannah Karp

Dec. 2, 2012 6:57 p.m. ET

Train crews had recently reported signal problems on the New Jersey railroad bridge that collapsed Friday morning, derailing a train and releasing a toxic vapor cloud into the air, federal regulators said Sunday.

Investigators are still waiting to enter the site of the accident in Paulsboro, N.J., just south of Philadelphia, because of the potentially harmful fumes there. On Sunday, they planned to interview rail workers who had been...